Side effects to strattera?

can anyone help me please my son is 6 yrs old and lives with autisum as well as adhd he has been prescribed strattea 10mg for the first week and going up there after untill he will be on 28mg is that to much for a young child? my main cincern is reading that some people can have suicide thoughts this frightens me as how will i no this with him only been 6 and when could this happen anytime?? or at the begining... how long will the side effects last if he has some this is so hard as a parent as you wont the best for your child and making a decision like this is life changing please help i need some feedback from anyone who has been through this possitive or neg thanks amanda